Xwilliam-m



(No Model.)

W. M. GREEN.

VBNTILATING SBWERS.

Patented July l, M584.

N. PETERS. Vhuwuxhagmphcr. wnshingxon. D. c.

1 limitan .drames Partnr Ormes@ VIIJLIABJI M. CREEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO TIIE EXHAUST VENTILATOR COMPANY, OF SAME PLACE.

VENTLTING Stihl/ERS.

SPECIFICATION forming part of Letters Patent No. 301,230, dated July 1,1884.

(No model.)

To a/Z whom it may concern:

Beit known that l, Wiiimrnir M. GREEN, of

Chicago, Cook county, State of Illinois, have invented certain Improvements in Ventilating 5 Sewers, of which the following is a specificaA tion. I

The object of my invention is to remove the foul gases from sewers,and prevent at all times any such excess of pressure therein or such upward flow of the lighter gases as will enable the latter to pass from the sewers to the streets or buildings connected therewith; and this obect I attain by combining with the main sewer or main branches an exhausting apparatus,

and by providing means whereby the inlets communicating with the sewer are sealed against the passage ofgasestherefrom,while the iniiow of liquid matter is not interfered with.

In the drawings, Figure l is a longitudinal Q0 section illustrating amain sewer, laterals,and sealing and exhausting appliances. Fig. 2 is a plan ofthe gate used for one ofthe dischargeopenings. Fig. 3 is a vertical section of Fig. 2. Fig. el. is a section illustrating one formel' gate used for protecting the exhausting apparatus.

A indicates the terminal portion of a main sewer at the end of a wharf, embankment,- or other usual place, and B represents inlets,

3o which may be the inlets leading from street openings or the ends of drains from buildings.

C is a branch `extending from the lowest point of the main sewer, within the mouth thereof, to the point where the liquid matter 3 5 should be discharged, the object of this branch being to deflect said liquid matter from the mouth ofthe sewer and from the air or gas exhausting device G,which is arranged therein. As shown, the exhausting device G is an ex- 4o haust fan or wheel of suitable construction, to which a rotary motion is imparted from any suitable apparatus, and whereby the gases within the sewer are forcibly drawn out and expelled.

It is of course necessary that the sewer shall be sealed so far as to'prevent the ingress of' air, as otherwise there could be no exhausting effect suficient to prevent the light gases from escaping through the openings uniting with 5o the streets or buildings, while it is also essential that there shall be no impediment to the free discharge of liquid matter through said openings into the main sewer. To effect this each opening is provided with a gate which will remain automatically closed until the pressure of fluid thereon causes it to open for the discharge ofthe fiuid into the sewer. As shown, each gate is a plate, d, hinged at the edge farthest from the outlet of the sewer, fitted closely to the mouth of the inlet B, and held in contact therewith, so as to seal said mouth, either by acounter-weight at the rear side ofthe hinge, as shown at x, Fig. l, or by a weight, b, secured to a cord, e, passing over a pulley, a, arranged within the inletpipe,or by a spring, s, or otherwise. rlhe weight maintains the gate closed until the pressure of water above it causes it to open and discharge the said water into the sewer.

The gate I) of the branch Cshould be made so as to open to a slight extent to discharge the fluid when a 'small portion only passes th rough the sewer, and yet be capable of opening so as to expose the entire area ofthe branch when the discharge is great enough to require it. To secure this result the gate is made in sections, each section capable of opening independentl y ofthe other, but all capable of opening together. Such gates may be made in different ways, a preferable construction being shown in Figs. 2 and 3, where the gate consists of triangular platesf, each hinged at one side, so as to swing downward independently of the others, and each supported by a counter-weight or spring. Vhenbut asmall portion of water is thrown upon a gate thus constructed, the sections will separate but slightly, and the water will pass downward without eX- posing au opening of any considerable extent i'orthe admission of air; but when the volume of water increases, -the further separation of these sections will permit its free passage. Some of these sections are counterweighted to a greater extent than others, so that but one or more ofthe sectionswill yield and expose 95 buta small opening when the stream is small.

To prevent injury to the exhausting device should the sewer become flooded, I place between the latter and the gate D a self-closing gate, I-I, Figs. 1 and 4, which, should the waroo ter pass beyond the branch C,will rise,and by obstructing the sewer prevent the water from passing through the exhausting device. rIhis gate may be made in different ways. As shown, it consists of a wooden panel, h, sliding vertioally in a well, z', and provided at the top with a wood or hollow float, f which will rise with the surface of the water, carrying the gate with it. The panel, however, may be hinged at the outer edge, and provided with a iioat at the inner edge, so as to rise from a v ertical to a horizontal position.

In some instances the water may discharge directly from the mouth of the main sewer, and the exhaust apparatus may be arranged iu au opening leading from the top of the sewer. An ejector or other suitable exhausting device may take the place of the wheel shown.

Without limiting myself to the precise construction and arrangements of parts described, I claim- 1. 'Ihe combination, with a sewer, of an ex haust apparatus at the outer end thereof, and gates arranged at the mouths ofthe sewer-inlets communicating with the top of the sewer, constructed to open automatically for the passage of iiuid, and to close after'the same has been discharged vinto the sewer without obstructing the iiow of liquid through the same, 3o

substantially as set forth.

2. The combination of the sewer, exhaust apparatus, discharge branch arranged at the rear of said apparatus, self opening and closing gates at the mouths of the inlets, and 35 an automatic gate at the mouth of the branch, substantially as specified.

3. rIhe combination, in the gate D, of the series of sections independently hinged, and

weighted or counterbalanced to different de- `4o grecs, for the purpose specified.

4. The combination, with the sewer dis` charge branch and exhaust apparatus, of a self-closing gate, II, arranged between the branch and mouth of the sewer, to prevent the 45 Witnesses:

OHAUNCEY KEEP, WILLIs H. BRUMLEY. 

